# ntfs: Fix index_root heap OOB write in ntfs_ir_to_ib()

CVE record · `CVE-2026-90133`

- **Identifiers:** `CVE-2026-90133`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:06 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0 to before 825dec5120933e90c54e30e31ccfa6c3449043a8` (git)
  - affected: `0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0 to before dc09bf79b76f9a7157e225f449655f3f62f96c9c` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `7.1`
  - unaffected: `before 7.1` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0021, the 10th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90133](https://www.cve.org/CVERecord?id=CVE-2026-90133)
- [NVD: CVE-2026-90133](https://nvd.nist.gov/vuln/detail/CVE-2026-90133)

### References from the CNA

- <https://git.kernel.org/stable/c/825dec5120933e90c54e30e31ccfa6c3449043a8>
- <https://git.kernel.org/stable/c/dc09bf79b76f9a7157e225f449655f3f62f96c9c>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-90133>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90133/>. Everything for agents: <https://agentprime.io/llms.txt>.